White Holes: The Opposite of Black Holes?

A white hole is a theoretical object where matter and energy can exit—but nothing can enter.
They are essentially the time-reversed solution of black holes in Einstein’s equations.
Unlike black holes, white holes would repel matter rather than pull it in.
No observational evidence for white holes currently exists.
Some theories suggest black holes could transform into white holes after evaporating.
White holes might explain certain high-energy cosmic bursts, though this is speculative.
They could connect to black holes through hypothetical wormholes.
If real, they’d defy our normal understanding of thermodynamics and entropy.
White holes are popular in science fiction as gateways to other universes.
Whether they exist or not, they push physics to its limits and spark bold ideas.